中文摘要：

基于现有应力集中分析结果及随机扩大临界核统计理论，对正交（混杂）叠层复合材料中由于90°层的基体开裂、层间界面破坏、0°层中部分纤维断裂及纤维／基体界面损伤相互作用的最终拉伸破坏过程进行统计分析．计算结果为现有的实验所证实．计算结果表明，正交叠层板的最终拉伸强度与界面剪切强度有关，适宜的界面黏结，相应的强度最高．本研究可对此类复合材料的最终拉伸强度作出合理的预报，并为复合材料叠层板的优化设计提供理论依据．

英文摘要：

Based upon both the existing results of stress concentration analysis and randomly enlarging critical-ram theory, a statistical analysis of the ultimate tensile failure process in cross-ply （hybrid） laminates due to the interaction of the matrix cracking in 90 degree ply, interlaminated interracial failure, fracture of sam fibers in 0 degree layers and fiber/matrix interfacial damage was performed. The results had a good agreement with the existing experiments, and showed that the strengths were tented to the interfacial shear strength and they were the highest when the interracial cohesion was appropriate. This study can be used to make reasonable predictions for ultimate strength and to supply the optimum design of composite laminates with theoretical basis.